The following signs may be erected and displayed on city property, subject to the rules set herein:
A. 
Traffic control and traffic directional signs erected by the city or another governmental unit;
B. 
Official notices required or authorized by law;
C. 
Signs placed by the city in furtherance of its governmental functions; and
D. 
Signs allowable under Article VI of this chapter.
(Ord. 985-07 § 1)